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摘要水是人类生产、生活中不可缺少的组成部分,在各个领域内发挥着重要的作用。但水是不可再生资源,随着人类文明的进步、社会的发展、工农业生产水平的提高,人类对水资源的污染、破坏确日益严重,水危机威胁着地球,水污染的防治已进入人类的日程安排。对污水进行排放前的处理,即是控制污染源,以达到从根本上防止水体污染的目的。6205
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本设计的主要任务是新乡市骆驼湾污水处理厂的设计，设计规模为100000m3/d，采用了DE型氧化沟工艺。该污水厂的污水处理流程为：从泵房到沉砂池，进入氧化沟，二沉池，最后出水；污泥的流程为：从二沉池排出的剩余污泥首先进入浓缩池，进行污泥浓缩，然后进入贮泥池，经过浓缩的污泥再送至带式压滤机，进一步脱水后，运至垃圾填埋场。本设计的优势：(1)由于两沟交替硝化与反硝化，缺氧区和好氧区完全分开，污水始终从缺氧区进入，因此可保持较好的脱氮效果，且不需要混合液内回流系统；（2）单独设置二沉池，提高了设备的利用率和池体容积的利用率；（3）同时两沟池体和转刷设备的交替运转均可通过自控程序进行控制运行。设计结果表明：污水处理厂处理后的出水达到《城镇污水处理厂污染物排放标准》（GB18918-2002）中的一级B标准。
关键词：城市污水；氧化沟工艺；脱氮；
ABSTRACT
Water is one of the most important but unrenewable resources in the world , which plays the very inmportant role not only in our daily life,but also in the industrial,agricultural and scientific fields.But water is very dangerous when it is polluted .So we must try our best to prevent water resources from pollution.Although we have known this ,water pollution is inevitable,because we can not do anything without water,and used water can never be away from pollution.Thus ,to purify the polluted water before it goes to the river and sea is very seriously neccesery.
The main task of this design is the sewage treatment plant in someone City, design size 100000m3 / d, with the DE-oxidation ditch treatment process. The sewage treatment plant process: from the pumping station to the grit chamber, into the oxidation ditch, secondary sedimentation tank, the final effluent; sludge process: from the secondary sedimentation tank sludge discharged from the first into the concentration tank, for pollution soil enrichment, and then into the storage basins, was concentrated in the sludge and then sent to the belt filter press, and further dehydrated, transported to the landfill.The advantages of the design : (1) as the two furrow nitrification and denitrification, anaerobic zone to aerobic zone completely separate from the anoxic zone, sewage has entered, therefore can keep good removal effect of nitrogen, and does not need the mixed liquid internal reflux system; (2) a separate set of two sink the pond, improve the utilization ratio of the equipment and the pool volume utilization; (3) while the two channel pool body and a rotary brush device alternation operation can be controlled through program control operation.Design results show that: the sewage treatment plant treated effluent to achieve "urban sewage treatment plant pollutant discharge standard" (GB18918-2002) in a B standard.
Key words：Urban sewage; DE-oxidation ditch process; nitrogen removal; Design
目录
1．绪论 - 1 -
1.1当前城镇污水处理概述 - 1 -
1.1.1 城镇污水的组成 - 1 -
1.1.2 城镇污水的水质 - 2 -
1.1.3 城镇污水的处理方法 - 2 -
2.污水处理厂的规模和处理工艺的确定 - 5 -
2.1 设计要求 - 5 -
2.1.1 污水处理厂的设计原则 - 5 -
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